Brake



`Patented July 1,2, l9 27.

'PAUL BASTIEN, oF INDIANAroLIs, INDIANAQASSIGNR To BENDIx BRAKE com- I'Amfor CHICAGO, ILLINOIS,

A oonIoRA'rIoN oF ILLINOIS'.

BRAKE.

original appmnon mea amber 4,

This invention relates to brakes, and is illustrated as embodied in an internal expanding brake for an automobile wheel. An object of the invention is to provide a Anovel 6 and simple, but efficient, connection between a pair of brake' shoes or other friction devices so arranged that one operates the other through the connection. Preferabl one shoe or other device is anchored, as or ex- 10 ample by being-mounted on a fixed pivot at one end, and is operated, as described, through the connection.

In one desirable arrangement, the novel connection includes a lever, which'may be a bellcrank-lever ulc'rumed between the axis and the circumference of the brake drum, and which is shown pivotally connected at its ends to the shoes.

Other features of the invention relate to a novelvarrangement .of return springs for the anchored shoe, and to other novel combinations of parts and desirable particularI constructions, all of which will be apparent from the following description of one illustrative embodiment shown in the accompanying drawing, in which v Fig. 1 is a vertical section showing one wheel and its brake in inside elevat-ion; and

' F ig. 2 is a rear elevation of the wheel and brake, broken away'to show the brake in transverse vertical section on the line 2 2 of Fig. 1.

In the arrangement illustrated, a wheel l0, rotatably mounted on an axle including a drive shaft 12 and a housing 14, carries a brake drum 16. Within the drum are `friction devices, such 'as arcuate shoes v18and 20, vsh-oe 18 being anchored on a pivot or iixed anchor 22 on a support 24 carriedby housing 14. i

Shoe 20, or its equivalent,'is- 'arran ed to be forced against lthe drum, against t 1e resistance ofa return spring '26 connected at its ends to the two shoes,` by means such as a cam 28 on a shaft `30 journalled in support 24 and operated by an arm 32. The free end of shoe 20 is guidedby a slot 34 embracing a pin 36 carried by support 24.

Between the adjacent ends of the shoes is a connection such as a bellcrank lever 38 fulcruined, preferably approximately `midway between theaxis and the circumference 'of the drum, upon a fixed pivot 40. One

end-of this lever ispivoted, preferably by 1928, Serial No. '666,51`4." Divided and this application led March s, 1ste;- serian'I No. 93,028.

a' slot 42 embracing a pivot'l pin 44, to the 55 end of shoe 20. The other end of the lever, or an equivalent partirigid with the lever, is connected by means such as a pivot 46 to the unanchored end of shoe 18. Thus movement of shoe 20 with the drum, 60

when the brake is applied, rocks lever 38 to force shoe 18 against the drum. Shoe 18 1s shown urged away from the drum by two return springs, one spring 48 being connected directly'to the shoe 18 while the other 65 spring 50 is connected to shoe 20 at such an angle that it tends to act through connection 38 to swing shoe 18 away from the drum. f 1

' While one illustrative embodiment has 70 been described'in detail, it is not my inten- I tion to limit the scope of the invention to that particular embodiment, or otherwise` ,'than by the terms of the appended claims.

The present application is a division of my 75 application No. 666,514, filed October 4, 1923. i

I claim:

l. A brake comprising, in con'ibination, a

drum, a pair otfriction .devices engageable 90- with the drum, and a rigid lever fulcrumed between its ends. between the center of the drum and its circumference, one friction de'-l vice being directly pivoted to the lever and' arranged to act on one end of'Y the lever to 85 rock the lever about its fulcrum, and the other end of the lever being directly pivoted to the other deviceand arranged to force the other friction device against the drum.

2. A brake comprising, in combination, a drum, a pair of shoes arranged end to `end and engageable with the'same zone of the drum, and ,a lever fulcrumed -between its ends between the center of the drum and its circumference, one shoe being p'ivotally 95 "connected to theleve'r and arranged to act on 4one end of the lever tol rock the-'lever about its fulcrum, and the lever also bein positively connected to theothcr shoe an eing arran ed to4 force lthe against the rum.

3. A brake comprising, in combination a drum, a-pair of friction devices engageab e with the same'aone of the drum, and a .bell` crank lever connected at its ends to said fric- 105 tion devices so that'the one device forces the other against the drum by rocking the bell- Icrank lev i f other shoe" 

